.container {
    width: 60%;
    min-height: 220px;
    background-color: aqua;
    margin: 0 auto;
}

h2 {
    text-align: center;
    padding-top: 10px;
}

p {
    text-align: center;
    width: 90%;
    margin: 0 auto;
}

input {
    box-sizing: border-box;
    width: 60px;
}

p#result{
    margin: 20px auto;
    width: 75%;
    height: 40px;
    border: 1px dotted goldenrod;
    background-color: rgb(221, 220, 220);
    padding: 20px;
    font-weight: bold;
}